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I've seen this happen when the sending user is on a bad connection - if your mailboxes are on different servers, it could have tried to send the message multiple times until it finally went through. &nbsp;Especially if this had an attachment, even a logo graphic...
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I've seen this happen when the sending user is on a bad connection - if your mailboxes are on different servers, it could have tried to send the message multiple times until it finally went through.  Especially if this had an attachment, even a logo graphic...

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Are the message Ids of the emails same or different ?
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Are the message Ids of the emails same or different ?

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why would i have received the same email 4 times from a internal user?<br />
user says they only sent it once however i received the same mail at 4 different times<br />
using 365 hybrid
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why would i have received the same email 4 times from a internal user?
user says they only sent it once however i received the same mail at 4 different times
using 365 hybrid

why did i receive same email from a user at 4 different times

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.